| SUB-CATEGORIES in REFERENCE |
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Almanacs
Arts, History, Sports, Regional...
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Archives
Arts, Professional Resources...
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Ask an Expert
Science and Technology, Education...
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Biography
Historical Personages, Culture...
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Books
E-Books, Libraries, Society...
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Dictionaries
By Subject, Acronyms, Rhyming...
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Directories
Address and Phone Numbers, Arts...
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Education
Study Abroad, Hotel Training...
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Encyclopedias
Infoplease.com, Open Content...
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Flags
Etiquette, Flag Day, Vexillology...
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Journals
Medicine, Science, Business...
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Knots
Lashings, Neckties, Tyers...
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Knowledge Management
Events, Education, Directories...
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Libraries
Directories, Archives, By Region...
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Maps
Shopping, Maps, Cartography...
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Museums
Science, Maritime, Military...
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Open Access Resources
Free Access Scientific Archives...
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Parliamentary Procedure
Directories and Guides, By Country...
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Quotations
Atheism, Wisdom, Wordplay...
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Thesauri
By Subject, Authority Control...
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Time
Network Time Protocol, Horology...
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World Records
Auto Speed Records, Guinness...
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